I try run a USB CDC on my eval board using USB FS. I generate from cubeMX a code with CDC, set a clocks (HCLK sets on 216MHz and 120MHz but USB clk on 48MHz) A clear code from cubeMx should cause that windows find a virtual com port in device manager but it isn't like that. On oscilloscope i don't see any signal on D+ and D-... I checked a RCC register but I saw that clock for USB FS is enable. I connected a usb fs on my PC and laptop where I have windows 10 and PC where is linux ubuntu.
Did anyone have a problem either with USB CDC on stm32f7 disco using USB FS?
In attachment is a my configurtion from cubeMx.